Hi,
I probably would be worried about the park low voltage shutting down the surge protector (if it does indeed shut off when input is say 100 volts) while using the autoformer.
The Autoformer output will stay above 110 volts all the time, and will not allow the surge protector to shut off due to low voltage.
I also found that the 30 amp receptacle at one campground was in such bad shape, that the internal brass was not gripping my power cord tightly, and was overheating. When I used my 50 to 30 amp adapter, everything went back to normal, voltage into my RV went up by 13 volts with the air conditioner running.
So if 50 amps is available, I will always plug in there, with the adapter. Then use my transformer if required to keep the voltage above 110 volts.
Fred.
